For me being tall with a bad back and some knee soreness, I find myself hitting half volleys where the ball bounces by my side or even behind me instead of bending down and taking the ball in the air. I don't even look at the ball since it is behind me anyway but just hold my arm and racquet back behind and somehow those half volleys find their way over the net, maybe since they are on the rise and coming off the strings at a steep angle despite the closed racquet face. Do other people ever do this? It's a weird sensation since I am looking straight ahead and hitting a ball behind me but it seems to work and I do it enough that it's well practiced and dependable. Does anyone else do this or do you all just bend those knees and hit low volleys? At what point should you hit a half volley instead of a volley? Only when the ball bounces in front of you?